7.-______ I lock the lab before I go home?
-Don’t bother.I’ll check it myself later.
A.May B.Must C.Can D.Shall
6.-I got an email from Susan, _ __ said she was going abroad for sightseeing.
-Fantastic! That’s what she has been dreaming of.
A.which B.she C.who D.it
5.I’m not sure whether I will have anything else to do this evening._____, I will try every possible means to come to your birthday party.
A.Even though B.If so C.Anyhow D.Instead
4.We needed a new cupboard for the kitchen.So Peter made _____ from some wood we had. A.it B.one C.himself D.another
3.He had a burning ________ to win back the teacher’s confidence in him.
A.desire B.feeling C.emotion D.impression
2.Pirates from Somalia who hijacked _____European carrier in ______ Indian Ocean threatened to kill its 25 crew members if any rescue operation was attempted.
A.the; 不填 B.a; the C.the; a D. the; the
22.(本小题满分15分) 已知抛物线C的顶点在原点,焦点为.
(1)求抛物线C的方程;
(2)已知直线与抛物线C交于、两点,且,求的值;
(3)设点是抛物线C上的动点,点、在轴上,圆内切于,求的面积最小值.
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